Tele Block is a members-only spell that requires a Magic level of 85 and can only be cast on another player in the Wilderness. If the attempt is successful, it will prevent the targeted player from using any form of teleport for 5 minutes, with the exception of the Mage of Zamorak. If the target had Protect from Magic on when the successful cast was made, the timer is halved to 2 minutes and 30 seconds.
The effects of the teleblock are lifted when the affected player logs out, leaves the Wilderness by any means (jumping over the wilderness ditch, dying, etc.) or when the teleblock timer expires. It is also lifted when players enter a safe area on PvP worlds. An affected player cannot enter Corporeal Beast's cave or use any teleport levers (to Edgeville, Mage Arena bank or King Black Dragon Lair) until the Tele Block wears out. Tele Block cannot be used on the same target again if they have been teleblocked until it wears off.